negotiator.boaframework.omstrategy

Class OfferBestN

java.lang.Object

negotiator.boaframework.OMStrategy

negotiator.boaframework.omstrategy.OfferBestN

public class OfferBestN
extends OMStrategy

This class uses an opponent model to determine the next bid for the opponent, while taking the opponent's preferences into account. The opponent model is used to select the N best bids. Following, a random bid is selected from this subset. Setting N > 1 is rational, as opponent models cannot be assumed to be perfect. Due to performance reasons, it is recommended to use BestBid if N = 1.

Author:

Mark Hendrikx

Field Summary

Fields inherited from class negotiator.boaframework.OMStrategy

model, negotiationSession

Constructor Summary

Constructors

Constructor and Description
OfferBestN() Empty constructor used for reflexion.
OfferBestN(NegotiationSession negotiationSession, OpponentModel model, int n) Normal constructor used to initialize the OfferBestN opponent model strategy.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canUpdateOM() Specifies that the opponent model may be updated when the current time is smaller than the deadline.
BidDetails	getBid(java.util.List<BidDetails> allBids) First this method determines the N best bids given the array of similarly preferred bids.
void	init(NegotiationSession negotiationSession, OpponentModel model, java.util.HashMap<java.lang.String,java.lang.Double> parameters) Initializes the agent by storing the size of the domain, and checking if the domain is large.

Methods inherited from class negotiator.boaframework.OMStrategy

getBid, getBid, init, setOpponentModel

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OfferBestN

public OfferBestN()

Empty constructor used for reflexion. Note this constructor assumes that init is called next.

OfferBestN

public OfferBestN(NegotiationSession negotiationSession,
          OpponentModel model,
          int n)

Normal constructor used to initialize the OfferBestN opponent model strategy.

Parameters:

negotiationSession - symbolizing the negotiation state.

model - opponent model strategy used by this opponent model strategy.

n - amount of best bids from which a random bid is selected.

Method Detail

init

public void init(NegotiationSession negotiationSession,
        OpponentModel model,
        java.util.HashMap<java.lang.String,java.lang.Double> parameters)
          throws java.lang.Exception

Initializes the agent by storing the size of the domain, and checking if the domain is large.

Overrides:

init in class OMStrategy

Parameters:

negotiationSession - state of the negotiation.

model - opponent model used in conjunction with this opponent modeling strategy.

parameters - set of parameters for this opponent model strategy.

Throws:

java.lang.Exception - thrown when initializing the opponent model strategy fails.

getBid

public BidDetails getBid(java.util.List<BidDetails> allBids)

First this method determines the N best bids given the array of similarly preferred bids. Next, a random bid is offered from this set.

Specified by:

getBid in class OMStrategy

Parameters:

allBids - list of similarly preferred bids.

Returns:

random bid from the subset of N best bids in the given set.

canUpdateOM

public boolean canUpdateOM()

Specifies that the opponent model may be updated when the current time is smaller than the deadline.

Specified by:

canUpdateOM in class OMStrategy

Returns:

true if the model may be updated